Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Line of Credit Facility, Remaining Borrowing Capacity	$ 20,300
Current assets:
Cash and cash equivalents	4,357	$ 4,416
Restricted cash	800	800
Accounts receivable, less allowance for doubtful accounts of $504 and $476, respectively	39,097	38,575
Allowance for Doubtful Accounts Receivable	504	476
Inventories, net	50,589	50,928
Miscellaneous receivables and prepaid expenses	4,764	3,728
Total current assets	99,607	98,447
Property, plant and equipment, net	26,392	27,333
Cash value of life insurance	12,007	11,964
Intangible Assets, Net (Excluding Goodwill)	11,342	11,813
Intangible assets, net	19,132	19,614
Deferred income taxes	20,806	21,248
Other assets	246	248
Total assets	189,532	190,667
Current liabilities:
Revolving line of credit	17,899	14,543
Accounts payable	13,209	12,394
Accrued expenses and other liabilities	28,727	33,040
Total current liabilities	59,835	59,977
Noncurrent liabilities:
Security bonus plan	12,928	12,981
Financing lease obligation	6,128	6,420
Deferred compensation	5,838	5,476
Deferred rent liability	3,329	3,512
Deferred Tax Liabilities, Net, Noncurrent	3,050	3,115
Other liabilities	4,859	5,696
Total liabilities	95,967	97,177
Stockholders' equity:
Authorized - 500,000 shares, Issued and outstanding — None	0	0
Authorized - 35,000,000 shares Issued - 8,921,609 and 8,921,302 shares, respectively Outstanding - 8,888,335 and 8,888,028 shares, respectively	8,922	8,921
Capital in excess of par value	13,655	13,005
Retained earnings	72,360	71,453
Treasury stock – 33,274 shares	(711)	(711)
Accumulated other comprehensive income (loss)	(661)	822
Total stockholders’ equity	93,565	93,490
Total liabilities and stockholders’ equity	$ 189,532	$ 190,667